X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/1e1ddfac79fbcd052f199500a6493c7f79cb8462..f5a39157bddc11662b93e06a9845c3d8a8dd7fa3:/src/OS/os.c-FreeBSD

diff --git a/src/OS/os.c-FreeBSD b/src/OS/os.c-FreeBSD
index cb0b0bf7f..02b78587b 100644
--- a/src/OS/os.c-FreeBSD
+++ b/src/OS/os.c-FreeBSD
@@ -3,6 +3,7 @@
 *************************************************/
 
 /* Copyright (c) Jeremy Harris 1995 - 2020 */
+/* Copyright (c) The Exim Maintainers 2021 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* FreeBSD-specific code. This is concatenated onto the generic
@@ -16,10 +17,11 @@ Sendfile shim
 ssize_t
 os_sendfile(int out, int in, off_t * offp, size_t cnt)
 {
-off_t loff = *offp, written;
+off_t loff = offp ? *offp : 0;
+off_t written;
 
 if (sendfile(in, out, loff, cnt, NULL, &written, 0) < 0) return (ssize_t)-1;
-*offp = loff + written;
+if (offp) *offp = loff + written;
 return (ssize_t)written;
 }